IUPAC name of `CH_(2)OH-CH_(2)OH` is

Options

A. Ethylene glycol
B. Ethane -1,2- diol
C. Ethyl -1,2- diol
D. Ethylene diol

Explanation

To determine the IUPAC name of the compound `CH₂OH-CH₂OH`, we can follow these steps:

### Step 1: Identify the Carbon Chain
The given compound has two carbon atoms connected by a single bond. Therefore, the parent chain consists of 2 carbon atoms.

### Step 2: Determine the Root Name
For a 2-carbon alkane, the root name is "ethane".

### Step 3: Identify the Functional Groups
The compound has two hydroxyl (–OH) groups. Each hydroxyl group is a functional group that indicates the presence of alcohol.

### Step 4: Number the Carbon Atoms
We need to number the carbon atoms in such a way that the hydroxyl groups get the lowest possible numbers. In this case, we can number the carbons from left to right:
- The first carbon (C1) has one hydroxyl group (–OH).
- The second carbon (C2) has another hydroxyl group (–OH).

### Step 5: Indicate the Positions of the Hydroxyl Groups
Since both hydroxyl groups are on the first and second carbon, we denote their positions as 1 and 2.

### Step 6: Use the Appropriate Suffix
Since there are two hydroxyl groups, we use the suffix "diol" to indicate the presence of two –OH groups.

### Step 7: Combine All Parts for the IUPAC Name
Putting it all together, we have:
- Root name: ethane
- Positions of hydroxyl groups: 1 and 2
- Suffix for two hydroxyl groups: diol

Thus, the complete IUPAC name is **ethane-1,2-diol**.

### Final Answer:
The IUPAC name of `CH₂OH-CH₂OH` is **ethane-1,2-diol**.

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